Grading-machine.



C. K. STCKLAN. (3R/mme MACHINE. APPLICATION FILED DEC. I7 1914. M4799@Pame Nm if", wm

3 SHEETS-SHEET l. @ha j." f3 23 77 C.' K. STUCKLAND. GRADING MACHINE.APPUCATION FILED nic. l1. 1914.

Pat/@Mad Nov. 27, 19W.

3 SHEETS-SHEET 2.

C. K. STOCKLAND. GRADING MACHINE. APPLICATION FILED DEC. I7. |914.

- Y Patented Nov. 27, 191?.

3 SHEETS-SHEET 3.

CHARLES K. STOGKLAND, OF MINNEAPOLIS, MINNESOTA.

GRADING-MACHINE.

Specification of Letters Patent.

Patented Nev. 3'?, 11313'.

Application filed December 17, 1914. Serial No. 877,636.

To all 'whom t may concern:

Be it known that I, CHAnLEs K. STOCK- LAND, a citizen of the UnitedStates, residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements inGrading-Machines, of which the following is a specification.

My invention relates to grading machines, particularly of the type thatis operated by traction engines, and has for its object to provideimproved draftbar means suitable for offsetting the point of attachmentto the traction engine or other device for drawing the grader. Thisoffsetting means is manually controlled by means operative wholly withinthe frame of the grader.

The full objects and advatnages of my invention will appear inconnection with the detailed description thereof and are par- Yticularly pointed out in the claims.

ln the drawings, illustrating the application or my invention in oneform,-

Figure 1 is a side elevation of a grading machine embodying myimprovements. Fig. 2 is a plan view of the front part of the grader.Fig. 3 is a bottom view of the front part of the grader drawn to alarger scale with parts broken away and parts in section. Fig. 4 is anenlarged sectional view of a portion of the frame looking to-ward thefront. Fig. 5 is a longitudinal sectional elevation through the draftbarconnection and driving mechanism. Fig. 6 is a plan view of a portion ofthe scraper frame showing the drawbar secured in rigid alinement withthe frame.

As illustrated in Fig. 1, my grading machine comprises a frame 10supported by front and rear wheels 11 and 12, back platform 13, scraperblade 14 carried by draftbars 15 which are suspended by links 16 fromrock shafts 17, having on their ends worm gears 18 operated by handworin wheels 19, all of which is common and wellknown in the gradingmachine art. As described and claimed in my co-pending application,Serial Number 835,797, led May 2, 1914, I connect the front end of thedraftbars to slide vertically along a vertical post 20, which, in thisinstance, is a hollow pipe for purposes which will later appear. Thescraper is quickly lifted by means of an elbow lever 21 connected withthe front end of draftbars 15, and another elbow lever 22 connected withpieces 32 slidable on arc therewith bodily in a vertical direction, all

as described and claimed in my aforesaid application. The draftbarmechanism 15 includes a collar 33 having a roller 34 journaled in theforward part thereof for engagement with the upright 20, as best shownin Fig. 5.

The frontpart of frame 10 has secured thereto by means ofangularly-disposed arms 26 and 27 a bolster plate 28 which rests upon asimilar bolster plate 29 rigidly connected by means of arms 30 and 31with the front axle, all as best shown in Fig. 4. The collar 33 ofdraftbar 15 normally rests upon the bolster plate 28 when the draftbarsand scraper are in lowered cr operative position. A drawbar 35 extendsforwardly from the post upon which it is journaled immediately below thebolster plate 29. A shaft 36 extends through the center of post 20 andhas secured to the upper end a bevel gear 37, and has secured to thelower end a bevel gear 38 which comes below a casting 39 fast on drawbar35. By this means the drawbar is held positioned upon the lower end ofpost V2O, below bolster plate 29. An are member 40 is secured at itsends to the angular arms and 31 and is provided on its under surfacewith a series of pins 41, forming in enect a segment rack on said arcmember. The drawbar has secured thereto an arm 42 extending rearwardlyabove the arc member 40. The arm 42 carries a plate 43 which has securedthereto a plurality of lugs 44 embracing the edges of arc member so asto form a slide thereon. Secured to plate 42 and lugs 44 is a housing 45in which is journaled a short shaft 46 carrying inside of the housing aworm disk 47 provided with a face worm 48 engaging between the pins 41,as best shown in Fig. 3. The shaft 46 carries a bevel gear 49 outside ofhousing 45, which meshes with a bevel gear 50 on a shaft 51 journaled inan eXtension 52 from housing 45 and an extension 53 of casting 39. Onthe shaft 51 is a bevel gear 54 meshing with bevel gear 38 on thevertical shaft 36. A shaft 55 is journaled at its rear end to a standard56 and at its forward end in a bracket 57, said shaft beT ing providedwith a bevel gear 58 meshing with bevel gear 37 on vertical shaft 36. Bymeans of a hand wheel 59 positioned on the end of shaft 55 adjacent theplatform 13 said shaft may be rotated by the operator. This will result,through the connections de-Y scribed, in turning the worm 48, which, byengagement with the pins 41 on segment 40, will have the effect ofoscillating the drawbar 35 relative to the axle 32, said axle beingotherwise held fixed relative to the drawbar by means of the pins 41 andworm 42. If the drawbar is free to oscillate, as in Figs. 2 and 3, itwill be turned relative to the axle, and the axle and front wheels willrespond to lateral movements of the drawbar. As shown in Fig. 6, thedrawbar 35 is rigidly connected to frame 10 by means of brace rods r"o0and 61, said drawbar being thereby held in the longitudinal centralline. of the machine. Rotation of the hand wheel 59 and parts connectedthereto will, under, these conditions, operate to oscillate the axle 32and the front wheels 11, by which means the scraper may be steeredindependently of the drawbar 35.

The advantages of this organization will be apparent. In the ordinaryuse of the construction, as indicated in Figs. 2 and 3, the drawbar maybe turned so as to extend forwardly to one side of the line of draft,where the same may be connected with the traction engine or otherpulling means. The advantage of this is, that the engine may run uponthe level central portion of a road while the scraper will be down onthe sloping side-portion of the road where the scraper must ordinarilyoperate. The turning of the drawbar under these circumstances is alwaysabout the draft post 2O as acenter, so that the draft strain is alwaysdirectly carried to this draft post. By reason of the fact that theoscillation of the drawbar is about the draft center, it is an easymatter for the operator to move the drawbar when the machine is inoperation and the draftbar subject to heavy strain. It will be apparentthat the operator by manipulation of the hand wheel 59 can so oscillatethe drawbar 35 and the tongue 64 connected therewith as to hold thescraper to its work at the side of the road while the traction enginewhich pulls the grader runs along the top level. Under some conditionsbetter results may be obtained by holding the drawb'ar 35 rigid, asindicated in Figs. 1 and 6, in which case the wheels 11 become ordinarysteering wheels which are oscillated and controlled by the shaft 55 andhand wheel 59.

Copies of this patent may be obtained for iive cents each, by addressingthe Commissioner of Patents,

I claim:

1. In combinationY with the frame and front axle of a grading machine, aVdraft post mounted in said frame and providing aV point of pivotalattachment of the frame with theaxle, a drawbar pivoted to said draftpost and having a portion thereof extending rearwardly of the same, aholding device including a rigid sector coperating with saidrearwardly-extended portion to hold the drawbar and axle in fixedrelative position, and means including a shaft extendine` through thedraft post to operate the holding means to oscillate the drawbar.

2. In combination with the frameV and front axle of a grading machine, adrawbar,

common means pivotally connecting said drawbar and axle with theV frame,means holding said drawbarand axle in fixed relative position, and meansunder the control of the operator including a shaft extending throughthe center of oscillation of said drawbar and axle for operating theholdingmeans to cause the same to oscillate lthe drawbar and axlerelatively. Y

3. In combination with the frame of a grading machine, a tubular draftpost mounted on said frame7 a front axle journaled on said draft postfor oscillatory movements ina horizontal plane, a drawbar pivoted tosaid draftpost, means holding said drawbar and axle in fixed relativeposition,v and means under the control of the operator including a shaftextending through the draft post in the axis of oscil lation of the axleand drawbar for operating said holding-means to cause the same tooscillate the drawbar and axle relatively.

4. In combination with the frame of a grading machine, a tubular draftpost mounted on said frame, a front axle journaled on said draft postfor oscillatory movements in a horizontal plane, a drawbar pivoted tosaid draft post, a 'segment rack connected with the axle, a wormengaging said rack and normally holding the Vdrawbar and axle in fixedrelative position, a shaft extending through said tubular .mem-v ber andthe axis of oscillation of the axle and drawbar, gear mechanismconnecting said shaft with the worm, and a hand wheel having operativeconnection with said shaft for rotating the shaft and worm to oscillatethe drawbar and axle relatively.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES VK. STOCKLAND. Witnesses:

G. A. STOCKLAND, F. A. WHITELEY.

Washington, D. C.

